dom/performance/tests/test_performance_user_timing_dying_global.html

   1 <!DOCTYPE html>
   2 <html>
   3     <head>
   4         <title>Test for User Timing APIs on dying globals</title>
   5         <script src="/tests/SimpleTest/SimpleTest.js"></script>
   6         <script type="text/javascript">
   7             // We must wait for the iframe to load.
   8             SimpleTest.waitForExplicitFinish();
   9             window.addEventListener('load', () => {
  10                 const dyingWindow = initTest();
  11                 ok(true, 'Initialization complete');
  12
  13                 testDoesNotCrash(dyingWindow);
  14                 SimpleTest.finish();
  15             });
  16
  17             function initTest() {
  18                 // We create a dying global by creating an iframe, keeping a
  19                 // reference to it, and removing it.
  20                 const iframe = document.querySelector('iframe');
  21                 const iframeWindow = iframe.contentWindow;
  22
  23                 // We want to call the User Timing functions in the context of
  24                 // the dying global. However, we can't call constructors
  25                 // directly on a reference to a window so we have to wrap it.
  26                 iframeWindow.newPerformanceMark = () => {
  27                   new PerformanceMark('constructor', {detail: 'constructorDetail'});
  28                 };
  29
  30                 // Send the global to a dying state.
  31                 iframe.remove();
  32
  33                 return iframeWindow;
  34             }
  35
  36             function testDoesNotCrash(dyingWindow) {
  37                 ok(true, 'Running testDoesNotCrash');
  38
  39                 dyingWindow.newPerformanceMark();
  40                 ok(true, 'new PerformanceMark() on dying global did not crash');
  41
  42                 try {
  43                     dyingWindow.performance.mark('markMethod', {detail: 'markMethodDetail'});
  44                 } catch (e) {
  45                     is(e.code, e.INVALID_STATE_ERR, 'performance.mark on dying global threw expected exception');
  46                 }
  47                 ok(true, 'performance.mark on dying global did not crash');
  48
  49                 try {
  50                     dyingWindow.performance.measure('measureMethod');
  51                 } catch (e) {
  52                     is(e.code, e.INVALID_STATE_ERR, 'performance.measure on dying global threw expected exception');
  53                 }
  54                 ok(true, 'performance.measure on dying global did not crash');
  55             }
  56         </script>
  57     </head>
  58     <body>
  59         <iframe width="200" height="200" src="about:blank"></iframe>
  60     </body>
  61 </html>